Keysight Technologies E5405A-Pro Series User Manual

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Keysight Technologies E5405A-Pro Series User Manual Manual pdf 61 page image

60 Keysight E5400-Pro Series Soft Touch User’s Guide4 Operating the E5402A, E5405A, and E5406A-Pro Series ProbesEye OpeningThe eye opening at the logic analyzer is the truest measure of an analyzer'sability to accurately capture data. Seeing the eye opening at the logicanalyzer is possible with Eye Scan. The eye opening viewed with Eye Scanhelps the user know how much margin the logic analyzer has, where tosample and at what threshold. Any probe response that exhibits overshoot,ringing, probe non-flatness, noise, and other issues all deteriorate the eyeopening seen by the logic analyzer. The following eye diagrams weremeasured using E5402A, E5405A, and E5406A-pro series soft touchprobes and Eye Scan while probed mid-bus on a 50Ω transmission lineload terminated at the receiver. The data patterns were generated using a223 -1 pseudo random bit sequence (PRBS).Figure 40 Eye opening measurement schematic (E5402/05/06A)The following plots were made on an Keysight 16760A logic analyzer usingan Keysight 8133A pulse generator with a 250 ps rise time converter. Thefollowing measurements use Eye Scan to show the margin at 800, 1250,and 1500MT/s. The amplitudes are indicated in the captions.E5382AProbeZ0=50 ΩRtermDriver ReceiverRsource PRBSoutput50 ΩZ0=50 Ω50ΩLogicAnalyzerw/ EyeScanArtisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com